Feature:1. Made of highquality materials, durable and practical.2. Universally used for mountain bikes, road bikes and folding bikes.3. Seat tube clamp device size, suitable for 25.4mmand 8209 31.8mm or 11.25in.4. Engineering plastic, high strength, not easy to skew when exposed to the sun, not easy to break in cold winter, strict wire joints are not easy to loosen.5. Can bend and stretch, shrink on sunny days to reduce wind resistance, and stretch on rainy days to cover mud and water.6. Type B requires that there is a circular hole at the bottom of the front fork of a mountain bike, the inner diameter of the hole is 20and 8209 28mm, and the selfand 8209 added washer is greater than 28mm. Type A requires that there is a small round hole on the front fork of a road bike, and a cylindrical seatpost is required for the rear.Specification:Condition: 100 percent brand newItem type: Bicycle Mud GuardMaterial: engineering plasticsColor: blackSeat tube clamp device size: suitable for about 25.4mm-31.8mm or 11.25in. Suitable: mountain bike, road bike, folding bike general typeOptional type: A type, B typeA type size:Extension size: Approx. 420mm or 16.5inShrink size: Approx. 155mm or 6.1inB type size:Extension size: Approx. 420mm or 16.5inShrink size: Approx. 155mm or 6.1inType A requirements:The front fork of the road car has a circular hole Type B requirements:There is a large circular hole at the bottom of the front fork of a mountain bike, the inner diameter of the hole is 20-28mm, and a washer should be added for those larger than 28mm..Package List:1 Set x Bicycle Mud Guard1 Set x Bracket seat post1 x Accessory1 x User manual